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Advanced <br /> An Employee-Owned Company <br /> 20 December 2023 CLIENT — ATTORNEY PRIVILEGE <br /> Project No. 23-7523 <br /> Mr. Michael Gurev <br /> 1818 Grand Canal Boulevard, Suite 4 <br /> Stockton, CA 95207 <br /> Subject: Additional Site Investigation Work Plan <br /> LAKEWOOD PLAZA <br /> 306 North Ham Lane, Lodi, California 95304 <br /> Dear Mr. Gurev: <br /> AdvancedGeo, Inc. (AGI) has prepared this Additional Site Investigation Work Plan for <br /> the property located at 306 North Ham Lane, Lodi, California (site or subject property). <br /> Site structures and proposed assessment locations are illustrated in Figure 1. <br /> 1.0. INTRODUCTION <br /> A former dry-cleaning facility was located in Suite 308A at the site. An investigation at the <br /> site performed by Partner Engineering and Science, Inc. (Partner), including the collection <br /> of soil, soil-vapor, indoor air and groundwater samples, indicated low concentrations of <br /> dry-cleaning chemicals, most notably PCE (Tetrachloroethylene). <br /> According to Partner, PCE was "not detected in the analyzed soil and groundwater <br /> samples at concentrations exceeding regulatory screening criteria". PCE was reported in <br /> soil gas at concentrations ranging between 250 and 7,000 ug/kg and in sub-slab sample <br /> at concentrations between 2,000 and 13,000 ug/kg. Dry cleaning chemicals were reported <br /> in indoor air samples, though below regulatory screening levels. <br /> Based upon results of the samples collected by Partner, AGI completed additional <br /> investigation within and surrounding the former dry-cleaning unit. Results from the <br /> investigation further confirmed chlorinated hydrocarbon impact in the subsurface of the in <br /> and surrounding the property building. Based on this investigation and to attempt to define <br /> the lateral and vertical limits of chlorinated AGI is proposing the installation and sampling <br /> of additional temporary soil-vapor sampling points and the collection of soil and soil-vapor <br /> samples. Soil and soil-vapor samples will be collected at multiple depths in each boring. <br /> The scope of work is described in detail below. <br /> 837 Shaw Road • Stockton, CA 95215 <br /> Telephone (800) 51 1-9300 • Fax (888) 445-8786 <br />